Also refactor `current_tasks` to `current_collection`

Also enforce that tasks_list is only visible if there is an element

8851339 only changed the listings

See https://developer.gnome.org/documentation/tutorials/application-id.html

There were a few strange grammatical quirks such as commas when a comma isn't called for.

Fixes #1055

gtk4: Mark `gtk::GestureClick::unpaired-release` sequence parameter a…

Fixes https://github.com/gtk-rs/gtk4-rs/issues/1046

GDK4 does not require initialization, and this was previously broken
since `INITIALIZED` and `IS...

Despite taking `GdkDisplay`, this function casts the argument to a
`GdkX11Display`.

If the `Key` type is used for keyvals, this should be done consistently.

Fixes #1033

Update gir

See https://github.com/gtk-rs/gir/pull/1357

Fixes #993

Fixes #1023

Implement FusedIterator for custom iterators

Add `TaskObject::from_task_data`

fix vendoring by removing include from gdk4/Cargo.toml

- Get libadwaita from git since the ftp server seems to make problems
- Update comments
- Fix ...

This is already the case for pushes to master

This was done since we can't depend on:
- the local gtk4-rs, as well as
- libadwaita depending o...

- stable: used for every release or push to master
- git: used when using workflow dispatch

The current situation let the CI fail quite often

Also adds css so the links inherit the color

Fixes #992

Update gir files

Add rustfmt.toml to allow some editors to auto-format the code on save

Should give us fewer PRs that have wrong indentation.

Needed for #984

rustfmt was missing